@aaronhoyland@CamWesthead Did you try cleaning the flame sensor? Had this issue last year and some sandpaper and a light cleaning worked. Giveaway is if the furnace lights but goes out shortly after.
@chrislhayes Don't overlook the quiet ones. Oliver was the only one lying on a bed in the old @EdmontonHumane shelter, before it closed. Many of the other dogs in wire cages were stressed and barking (luckily new shelter design has more privacy for dogs and less stimulation). His mug shot.